Historical weather data, all-time temperature records, and monthly climate averages for South Milwaukee, WI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 4th in South Milwaukee sits right on the edge of winter's last gasp — the average low still dips to freezing at 32°, and there's a 1-in-8 chance of snow. The date has seen wild swings over 88 years of records, from a bitter 15° in 1982 to a shirt-sleeve 79° in 1997.
South Milwaukee's weather has real teeth: an all-time high of 103° in July 1995 and an all-time low of -26° in January 1982 represent a jaw-dropping 129-degree spread. The wettest single day on record dumped 6.81 inches on August 6, 1986, and a single February storm in 1960 buried the area under 16.7 inches of snow.
Summer is short and sweet here — peak warmth arrives mid-July with average highs of 81°, but by October the thermometer is already retreating to 60°. Winter is serious, with January highs averaging just 28°. If you're planning around rain, dodge mid-to-late June, which is the wettest stretch of the year.